Road-grader.



l No. 714,723. 'Patented nec. 2, |902.'

, J. w. MACY.

ROAD GRADER.

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Infra JASON W. MACY, OF BEACON, IOWA.

ROAD-GRADER.

SPECIFICATION forming part of Letters Patent No. 714,723, dated December2, 1902. Application filed May 9, 1902. Serial No. 106,532. (No model.)

To @ZZ whom, t may concern:

Be it known that I, JASON W. MACY, a citizen of the United States,residing at Beacon, in the county of Mahaska and State of Iowa, haveinvented certain new and useful Improvements in Road-Graders; and I dodeclare the following to be a full, clear, and eX- act description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same.

The invention relates to road-graders.

The object of the invention is to provide a machine of this characterwhich shall be simpleof construction, durable in use, compara- `tivelyinexpensive of production, efficient in action, and which in the tiltingof the scoop will not require the operator to lift the weight of themachine, as is the case in the form of road-graders now in use.

Vith these and other objects in View the invention consists in certainnovel features of construction, combination, and arrangement of parts,which will be hereinafter more fullyset forth, and particularly definedin the appended claims.

In the accompanying drawings, Figure lis a side elevation of my improvedroad-grader,

showing the scoop or shovel in position for use. Fig. 2 isa longitudinalvertical sectional view illustrating the position of the parts when theshovel is being tilted for` dumping and has reached a vertical position.Fig. 3 is a similar view after the shovel has been tilted, and Fig. 4 isa top plan view of the machine.

In the drawings, 1 denotes the main frame, which consists of thehorizontally-extending front piece 2, provided at its ends with brackets3, in which are pivoted the side pieces 4 by a transverse pivot 5.

6 denotes supporting-wheels journaled in the side pieces, and 7 denotesthe forward supporting wheel or caster, swiveled to the draft tub or bar8.

9 denotes draw-bars, the forward ends of which are bolted to thedraft-tub, and these bars are curved laterally and extend rearwardlyunder the front cross-piece of the frame and are connected to saidcross-piece by staples 10.

1l denotes a scoop or shovel provided with handles 12, projecting fromits rear end. The

forward lower end of the scoop or shovel is pivoted to the draw-bars 9by pivots 13, thus putting all the strain of draft directly upon thetongue and removing it from the frame. The rear end of the shovel orscoop is supported by laterally-projecting brackets 14, which hold thescoop in the inclined position shown in Fig. l of the drawings.

The operation of the machine is as follows'. After it has been filledand it is desired to discharge its contents the handles are grasped andforced upwardly. In this upward movement of the handles the lower edgeof the scoop or shovel is brought into firm contact with the ground,which acts as a fulcrum upon which the shovel is turned. Heretofore atthe instant upward pressure was applied to the handles of the shovel inthe act of tilting the shovel the fixed side pieces of the main frame,together with their supportingwheels, would be elevated, thus requiringthe operator to lift the combined Weight of the load, shovel, sidepieces, and frame. By hinging or pivoting the side pieces of the frameto the forward cross-piece thereof as the handles are moved upwardly inthe act of tilting the shovel the play of the side pieces will allow thewheels to remain in contact with the ground, and thus support the weightof the side pieces and frame, thus relieving the operator of thenecessity of lifting the weight of the side pieces and the wheels, asheretofore he has been required to do.

In Fig. 1 of the drawings the shovel or scoop is shown in position toscrape up the earth, and in this figure it will be noted that thesupporting-wheels are in contact with the ground. In Fig. 2 the shovelis shown in a vertical position, just in the act of swinging forwardlyof a vertical line to discharge its contents. It will be observed thatin this position the supporting-wheels are shown upon the ground, sothat in moving the shovel from the position shown in Fig. 1 to thatshown in Fig. 2 the weight of the supporting-wheels and side pieces isnot lifted by the operator.

From the foregoing descriptiomtaken in connection With the accompanyingdrawings, the construction, operation, and advantages of my inventionwill be readily apparent, it is thought, withoutrequiringa more extendedexplanation.

IOO

Various changes in the form, proportion, fporting-wheeis journaled tothe side pieces, and minor details of construction may be reof draw-barsconnected to the front of the sorted to Without departing from theprincimain frame, and a scoop or shovel pivoted to I5 ple or sacrificingany of the advantages of my said bars, substantially as set forth.

5 invention. In testimony whereof I have hereunto set Having thusdescribed my invention, what my hand in presence of two subscribing Wit-I claim, and desire to secure by Letters Patl nesses. ent, is-

In a road-grader, the combination With the JASON W MACY' 1o main frameembodying in its construction a Witnesses:

front piece and side pieces hinged to the front J. N. WILLIS,

piece to swing in a vertical plane, and sup- JAMES O. GRANT.

